In a mixing bowl, add the Greek yogurt, sweetener, and vanilla extract. Using a spoon or spatula, stir slowly at first and then more thoroughly until the mixture becomes completely smooth, creamy, and uniform with no lumps. Take a moment here—this step defines the final texture, so don’t rush it.
Taste the yogurt mixture and adjust the sweetness if needed. If you prefer it slightly sweeter, add a small amount of sweetener and mix again. It’s always better to adjust gradually rather than adding too much at once.
Rinse the berries under cold water and gently pat them dry with a paper towel. If you’re using larger berries like strawberries, slice them into smaller, bite-sized pieces so they layer evenly and are easier to eat.
Take a clean glass jar or container and spoon a generous layer of the yogurt mixture into the bottom. Use the back of a spoon to spread it out evenly, creating a smooth base layer.
Add a layer of mixed berries over the yogurt, spreading them evenly so each spoonful later has a good balance of fruit and creaminess.
Repeat the layering process by adding another layer of yogurt followed by another layer of berries. Continue this pattern until the jar is filled, making sure each layer is even and visually appealing.
Finish with a final layer of berries on top. If you want extra texture, sprinkle granola or crushed nuts over the top just before serving to keep them crunchy.
Cover the jars with lids or wrap them tightly and place them in the refrigerator for at least 30 minutes. This chilling step helps the flavors meld together and improves the overall texture.
Serve the yogurt berry cups chilled for the best taste and consistency, or store them in the refrigerator for later. When ready to eat, give them a quick stir or enjoy them layered as is for a more premium presentation.